From a birth date to a ready-to-post card
Milestone photography has a quiet math problem: babies do not turn one month old on the same calendar day the way adults age years. This card maker does the counting properly. It starts from the local birth date you enter, walks forward in whole calendar months, and then measures the remainder in weeks and days, so a baby born on August 31 reads sensibly in a short February, and a card made for a birth at 8:24 AM still counts whole calendar days rather than drifting by a few hours. The result is shown live as years, months, weeks and days against today’s date, which means the same saved link quietly rolls over from “11 months” to “1 year” on the right morning.
Four card templates are built in. Hello World is the birth announcement, fixed at day zero with a calm blue welcome palette. 100 Days moves the event to the one-hundredth day and dresses the card in a warm sun yellow. First Birthday lands on the exact twelve-month mark with a soft blush rose treatment, while Today tracks the live date and uses a gentle sage green — refreshing the page tomorrow moves the age forward automatically. Every card is composed for the 4:5 vertical format that fills a phone screen and a portrait print at the same time: a small letter-spaced occasion kicker, an oversized month number as the single hero, an English and Chinese age line, the exact event date, a hairline rule, and one personal line for a message or a blessing.
Printing and privacy
The on-screen card is only a 1200-pixel proof. On download, the whole composition is repainted at 300 dots per inch in the size you choose, from A4 and A3 to 16×20, 18×24 and 24×36 inches, with the small Memory Poster Studio footer mark kept legible rather than stretched from a screenshot. Use it as a photo overlay, a fridge print or a page in a first-year album. The birth date never leaves your device: there is no upload, no account and no watermark, so the file you share is genuinely yours.
从出生日期，到一张可以直接发社媒的卡片
成长记录摄影有个容易被忽略的算术问题：宝宝的月龄并不像成人的年龄那样按同一天匀速推进。这张卡片制作器会严格计算：从你填写的本地出生日期开始，先按完整的日历月向前走，再把剩余时间换算为周与天，因此 8 月 31 日出生的宝宝在只有 28 天的二月也能得到合理结果；即便出生在早上 8 点 24 分，卡片也按完整的日历日计龄，不会因为差几个小时而漂移。结果会按今天的日期实时显示为几岁、几个月、几周、几天——同一个页面在正确的那天清晨，会自己从「11 个月」翻到「1 岁」。
内置四种卡片模板：「初见世界」是出生公告，固定在第 0 天，使用安静的欢迎蓝；「百日纪念」把事件移到出生后第一百天，换成温暖的向阳黄；「一周岁」精确落在第十二个月，采用柔和的樱粉；「今天」则跟随实时日期，用清新的鼠尾草绿——明天再打开页面，月龄会自动往前走。每张卡片都按 4:5 竖版构图，既能铺满手机屏幕，也能直接竖版打印：字距疏朗的场合眉题、作为唯一主角的超大月龄数字、中英双语年龄行、精确的事件日期、一条细分隔线，以及一行属于自己的留言或祝福。
印刷与隐私
屏幕上的卡片只是 1200 像素的打样。下载时整幅画面会按你选择的尺寸以每英寸 300 点重新绘制，从 A4、A3 到 16×20、18×24、24×36 英寸，页脚小小的 Memory Poster Studio 字样也会保持清晰，而不是把截图拉大。它可以当照片叠字、冰箱贴打印，或收进一周年纪念册。出生日期不会离开你的设备：不上传、不注册、无水印，分享出去的文件真正属于你。
Why does the big number show months instead of days or years?
Month anniversaries are the rhythm parents actually photograph: monthly stickers run from 1 to 12 months, then birthdays take over. The full breakdown of years, months, weeks and days is still printed beneath the number, so a “14” card might also read 1 year 2 months 0 weeks 3 days. Hello World shows zero, and 100 Days keeps its named occasion in the kicker.
为什么大数字用月龄，而不是天数或岁数？
月龄纪念日才是家长真正会拍照的节奏：月度贴纸从 1 排到 12 个月，之后交给周岁生日。数字下方仍会印出完整的岁、月、周、天，例如「14」个月的卡片同时显示 1 岁 2 个月 0 周 3 天。初见世界显示 0，百日纪念的身份则由眉题保留。
Does the Today card really update itself?
Yes. Every time the page opens or redraws, it compares the birth date with the current local date, so the age line and the giant month figure advance on their own. The exported PNG captures the age at the moment of export, which makes reprinting the card on each monthly birthday a consistent little ritual.
「今天」卡片真的会自己更新吗？
会。每次页面打开或重绘时，它都会把出生日期与当前本地日期重新比较，年龄行与超大月龄数字会自动前进。导出的 PNG 记录的是导出那一刻的月龄，每逢月纪念日重新打印，就成了一套连贯的小仪式。
Can I use the card as an overlay on a milestone photo?
Absolutely — the 4:5 canvas matches the portrait crop used by most photo apps, and 300 DPI repainting keeps the type crisp over a picture. For a photo overlay, export the PNG and place it in your editor; the flat ivory and pastel palettes are intentionally easy to read over skin tones and blankets.
这张卡片能叠在纪念照上当字幕卡吗？
完全可以——4:5 的画布与大多数照片应用的竖版裁切一致，300DPI 重绘保证叠在照片上文字依然锐利。导出 PNG 后放进修图软件即可；象牙白与柔和粉彩色板特意调过，盖在肤色与襁褓布料上都清晰好读。
